Em field distribution and sar in a human head with mri coil .
在核磁共振成像时人头的电磁场分布和比吸收率。
Em currencies have also scored well .
新兴市场货币同样表现出色。
We got this code from a guy named george coulouris at university college in london * called em - editor for mortals - since only immortals could use ed to do anything .